Canada - Engine Control - MIL ON/DTC P0A7F Set
BulletinTSB2922
Issue Date
December 3, 2010
Title:
MIL "ON" DTC P0A7F
Component
ELECTRICAL
Models:
'07-'10 GS450h
INTRODUCTION:
Some 2007 - 2010 model year GS450h vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Code (DTC) P0A7F (Hybrid Battery Pack Deterioration) stored. Use the following repair procedure to address this condition.
APPLICABILITY:
WARRANTY INFORMATION:
PARTS INFORMATION:
CALIBRATION INFORMATION:
REQUIRED TOOLS & EQUIPMENT:
REPAIR PROCEDURE:
1. Using ETAS Techstream, confirm DTC P0A7F is present.
2. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in Figure 1. Confirm the HV ECU calibration has been updated. If the calibration ID listed is NOT the latest HV ECU calibration, go to step 3 and follow the repair procedure outlined in this TSB.
NOTE
If the HV ECU already contains the latest calibration ID, this TSB does NOT apply.
3. Replace the HV battery.
Refer to the Repair Manual within E-TAS / TIS library:
- Division: Lexus
- Model: GS450h
- Year: 2007 / 2008 / 2009 / 2010
- Service Category: Engine/Hybrid System
- Section: Hybrid/Battery Control System
- Keyword: Hybrid Battery Control: HV Battery: Removal
- Division: Lexus
- Model: GS450h
- Year: 2007 / 2008 / 2009 / 2010
- Service Category: Engine/Hybrid System
- Section: Hybrid/Battery Control System
- Keyword: Hybrid Battery Control: HV Battery: Installation
4. Inspect and adjust the automatic air intake control setting.
Press and hold the Outside Air / Recirculated Mode button on the HVAC unit until the smog sensor screen appears.
5. Set the sensitivity level to 2 steps to the left of Medium.
6. Flash reprogram the HV ECU.
NOTE
- The GR8 Battery Diagnostic Station MUST be used in Power Supply Mode to maintain battery voltage at 13.5 volts while flash reprogramming the vehicle.
- For details on how to use the GR8 Battery Diagnostic Station, refer to the GR8 Battery Diagnostic Station Instruction Manual located on ETAS/TIS library > Tools > tools and equipment > GR8 Battery Diagnostic Station Instruction Manual.
Follow the procedures outlined in TSB2401, "Techstream ECU Flash Reprogramming Procedure", and flash the ECM (PCM) with the NEW calibration file update.
7. Install the Authorized Modifications Label.
A. Using a permanent marker, enter the following information on the label:
- ECU part number [Refer to the Parts Information section for the CURRENT PART NUMBER]
- Calibration ID(s) [Refer to the Calibration Identification Chart for the NEW CALIBRATION ID]
- Dealer Code
- Repair Date
- Change Authority [This TSB number]
B. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 1. The Authorized Modifications Label is available through your facing PDC, P/N 00451-00001-25.
8. Clear any DTCs, then start the engine and warm it up to normal operating temperature. Test drive the vehicle to confirm normal operation.
NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.